package BookTest;

public class I13Test {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder("熊出没小心");
        sb.insert(3,", ");
        sb.insert(7,"; ");
        System.out.print(sb.toString());
        StringBuilder sb1 = new StringBuilder("熊出没小心");
        sb1.insert(2,", ");
        System.out.println(sb1.toString());
    }
}
